1) To be exhausted from a hard days work.
2) Unable to get wood due to excessive knobbing.
3) A gay phrase used by douchebags to try and make them believe they're having more sex than you.
Ben: "Ooooh yeah, after yesterdays exploits, I'm shagged out!"
Kevin: "What, those men tire you?"
To heal oneself by having a large amount of intercourse with a variety of partners until one reaches a state of inner calm.
"man, i gotta tell ya i just can't seem to get my head straight. i got aches and pains, anxiety. i just feel like i'm walking around in a fog half the time."
